In this study, we propose to obtain simultaneous measurements of blood oxygen saturation (SO2) and hematocrit (Hct) by combining two or more in vivo measurements of blood MR relaxation times. We tested our approach in 5 healthy human subjects using T2+T1 values and calibration curves obtained in vitro. The results found in the superior sagittal sinus vein (SO2=62±5% and Hct=46±1%) are in good agreement with literature values and suggest great potential of the approach once it is further validated.
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